void XSPI_PutByte(uint8_t out)
{
for(uint8_t i = 0; i < 8; i++)
{
if(out & (1 << i)) PINHIGH(SPIPORT, MOSI); else PINLOW(SPIPORT, MOSI);
PINHIGH(SPIPORT, SCK);
PINLOW(SPIPORT, SCK);
}
}
void XSPI_LeaveFlashmode(void)
{
PINHIGH(SPIPORT, SS);
PINLOW(SPIPORT, EJ);
_delay_ms(50);
PINLOW(SPIPORT, XX);
PINHIGH(SPIPORT, EJ);
}
void XSPI_Shutdown(void)
{
PINHIGH(SPIPORT, SS);
PINLOW(SPIPORT, XX);
PINLOW(SPIPORT, EJ);
_delay_ms(50);
PINHIGH(SPIPORT, EJ);
}
void XSPI_Init(void)
{
PINOUT(SPIDDR, KSK);
PINOUT(SPIDDR, EJ);
PINOUT(SPIDDR, XX);
PINOUT(SPIDDR, SS);
PINOUT(SPIDDR, SCK);
PINOUT(SPIDDR, MOSI);
PINHIGH(SPIPORT, EJ);
PINHIGH(SPIPORT, SS);
PINHIGH(SPIPORT, XX);
PINHIGH(SPIPORT, SCK);
PINHIGH(SPIPORT, KSK);
PINLOW(SPIPORT, MOSI);
}
void XSPI_Powerup(void)
{
PINLOW(SPIPORT, KSK);
_delay_ms(5);
PINHIGH(SPIPORT, KSK);
_delay_ms(5);
PINLOW(SPIPORT, KSK);
_delay_ms(5);
PINHIGH(SPIPORT, KSK);
_delay_ms(5);
PINLOW(SPIPORT, KSK);
_delay_ms(5);
PINHIGH(SPIPORT, KSK);
_delay_ms(5);
PINLOW(SPIPORT, KSK);
_delay_ms(5);
PINHIGH(SPIPORT, KSK);
}
uint8 set_relay_state(uint8 chan,uint8 val){
if (chan >= NUM_RELAY_CHANNELS)
return 0; //FIXME should be error
if ( val == 0 ){
_relay_state &= (uint8)(~( 1 << chan ));
if (chan == 0 ) {
PINLOW(RLA);
} else if (chan == 1){
PINLOW(RLB);
}
}
else {
_relay_state |= (uint8)( 1 << chan );
if (chan == 0 ) {
PINHIGH(RLA);
} else if (chan == 1){
PINHIGH(RLB);
}
}
return 0;
}
void XSPI_Write(uint8_t reg, uint8_t* buf)
{
PINLOW(SPIPORT, SS);
XSPI_PutByte((reg << 2) | 2);
XSPI_PutByte(*buf++);
XSPI_PutByte(*buf++);
XSPI_PutByte(*buf++);
XSPI_PutByte(*buf++);
PINHIGH(SPIPORT, SS);
}
void XSPI_Read(uint8_t reg, uint8_t* buf)
{
PINLOW(SPIPORT, SS);
XSPI_PutByte((reg << 2) | 1);
XSPI_PutByte(0xFF);
*buf++ = XSPI_FetchByte();
*buf++ = XSPI_FetchByte();
*buf++ = XSPI_FetchByte();
*buf++ = XSPI_FetchByte();
PINHIGH(SPIPORT, SS);
}
uint8_t XSPI_FetchByte()
{
uint8_t in = 0;
PINLOW(SPIPORT, MOSI);
for(uint8_t i = 0; i < 8; i++)
{
PINHIGH(SPIPORT, SCK);
in |= PINGET(SPIPIN, MISO) ? (1 << i) : 0x00;
PINLOW(SPIPORT, SCK);
}
return in;
}
uint8_t XSPI_ReadByte(uint8_t reg)
{
uint8_t res;
PINLOW(SPIPORT, SS);
XSPI_PutByte((reg << 2) | 1);
XSPI_PutByte(0xFF);
res = XSPI_FetchByte();
PINHIGH(SPIPORT, SS);
return res;
}
uint16_t XSPI_ReadWord(uint8_t reg)
{
uint16_t res;
PINLOW(SPIPORT, SS);
XSPI_PutByte((reg << 2) | 1);
XSPI_PutByte(0xFF);
res = XSPI_FetchByte();
res |= ((uint16_t)XSPI_FetchByte()) << 8;
PINHIGH(SPIPORT, SS);
return res;
}
